So if you are following us on Facebook you have already read this. We have been talking about this since almost the beginning of the COVID issue because the connection was noted early. Additionally we know, from studying the immune system before the age of COVID, Vitamin D has been known to play a role in the function of our immune system.
Many studies have been published since March 2020 on Vitamin D and COVID-19. The most striking, include studies like this that found that persons with Vitamin D deficiency were more likely to have had a COVID-19 infection. This was a study of 190,000 persons in all 50 US states. They authors had access to Vitamin D levels taken during routine bloodwork at some point in the previous 12 months before the patients contracted the infection. The authors support further research in using Vitamin D supplementation to reduce the risk of a COVID-19 infection.
In this study the authors find there is sufficient evidence to suggest higher levels of Vitamin D in our blood reduces our risk for a COVID-19 infection. They authors also state that the evidence shows decreased blood levels of Vitamin D increases our risk for contracting the infection. They go a step further to say that the evidence shows the severity of the COVID-19 infection may be related to the severity of Vitamin D deficiency. The authors suggest physicians recommend Vitamin D supplementation to the public and further research to confirm the observed findings of previous studies.
As I publish this post it is November, right now much of the world who live in the Northern Hemisphere is undergoing a surge in cases. Where we live is important to why there is a surge. I don’t want to make this post much longer so I will be brief. Our bodies produce Vitamin D when our exposed skin is in the presence of sunlight. Not just any sunlight but ultraviolet A light. Starting in the fall, and going through the winter, those of us living in the Northern Hemisphere will get very little UVB. No UVB = No Vitamin D through our skin. So lets take this back to COVID. No UVB may increase our risk for a COVID infection because of a lack of Vitamin D. Here is a paper discussing this exact thing. These authors examined sunlight exposure in continental metropolitan France. They found a correlation between decreased sun exposure and mortality due to COVID-19. The authors admit their study had several limitations but their analysis did show a strong correlation. Strong enough to recommend further analysis and that their findings should be taken into account when creating therapeutic and diagnostic procedures in response to COVID-19.
So the evidence is strong, we should all be taking Vitamin D regularly. We should also be getting sunlight, particularly UVB whenever possible. Also we should understand that the uptick in respiratory infection that occurs in the Fall and continues through the Winter, in the Northern Hemisphere, is related to Sunlight and Vitamin D levels. Therefore when it comes to COVID-19, as the research is trending to say, the Fall 2020 increase in cases might have a more to do with decreased UVB exposure than any other factor.
During the Fall, Winter, and Spring take adequate amounts of Vitamin D. What does that really mean, get your Vitamin D levels checked as part of your normal blood work. Then re-check it some time later to measure any improvement, if you are first found deficient.